5 CFR § 2635.205 - Limitations on use of exceptions.
Notwithstanding any exception provided in this subpart, other than § 2635.204(j), an employee may not:
(a) Accept a gift in return for being influenced in the performance of an official act;
(b) Use, or permit the use of, the employee's Government position, or any authority associated with public office, to solicit or coerce the offering of a gift;
(c) Accept gifts from the same or different sources on a basis so frequent that a reasonable person would be led to believe the employee is using the employee's public office for private gain;
(d) Accept a gift in violation of any statute; relevant statutes applicable to all employees include, but are not limited to:
(1) 18 U.S.C. 201(b), which prohibits a public official from, directly or indirectly, corruptly demanding, seeking, receiving, accepting, or agreeing to receive or accept anything of value personally or for any other person or entity in return for being influenced in the performance of an official act; being influenced to commit or aid in committing, or to collude in, or allow, any fraud, or make opportunity for the commission of any fraud, on the United States; or for being induced to do or omit to do any action in violation of his or her official duty. As used in 18 U.S.C. 201(b), the term “public official” is broadly construed and includes regular and special Government employees as well as all other Government officials; and
(2) 18 U.S.C. 209, which prohibits an employee, other than a special Government employee, from receiving any salary or any contribution to or supplementation of salary from any source other than the United States as compensation for services as a Government employee. The statute contains several specific exceptions to this general prohibition, including an exception for contributions made from the treasury of a State, county, or municipality;
(e) Accept a gift in violation of any Executive Order; or
(f) Accept any gift when acceptance of the gift is specifically prohibited by a supplemental agency regulation issued with the concurrence of the Office of Government Ethics, pursuant to § 2635.105.